3. The below figure shows two identical loudspeakers that are connected to the same signal generator. Position A is the

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3 The Below Figure Shows Two Identical Loudspeakers That Are Connected To The Same Signal Generator Position A Is The 1 (36.19 KiB) Viewed 29 times

3. The below figure shows two identical loudspeakers that are connected to the same signal generator. Position A is the mid-point between the two loudspeakers P and Q. A microphone is moving along a path BC. loudspeaker microphone . . signal generator B loudspeaker a. Explain why the loudness of sound varies along BC. [10 marks] b. Microwaves can be used in radar. Why are radio waves of lower frequencies not suitable for the use in radar? [5 marks) c. Given two radio channels, the broadcasting frequency of channel A is 94 MHz whereas the broadcasting frequency of channel B is 1MHz. If there is house surrounded by hills, for which radio channel is the reception better? [10 marks]